Big, stupid fun.
Put it this way: If you are a classic literature enthusiast who loves the book Moby Dick, this is not for you.
If you want to see an action-fantasy starring Danny Glover (big performance!) and Vinnie Jones, about a crew of dragon hunters with CG special effects, then this is the film for you.
Is it a bit silly? Yes it is, but no more than your average Hollywood blockbuster - this film's script is no better or worse than Spiderman 3, which I really enjoyed despite it being extremely stupid and shamelessly mainstream.
The real question is, is it entertaining?
Hell yes.
Leave your brain at the door and enjoy.........